/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.spark.scheduler.cluster

import java.util.concurrent.atomic.AtomicBoolean

private[spark] class SimpleExtensionService extends SchedulerExtensionService {

  /** started flag; set in the `start()` call, stopped in `stop()`. */
  val started = new AtomicBoolean(false)

  override def start(binding: SchedulerExtensionServiceBinding): Unit = {
    started.set(true)
  }

  override def stop(): Unit = {
    started.set(false)
  }
}
